Description: This function defines and modifies the load curves for a nonlinear analysis. The LOAD CURVE command requires several levels of submenus.
Usage:
1. DSI displays the Load Curve option menu as below figure
Figure 9.4.8.1 Load Curve Option Menu
2. After the user selects a command, DSI lists a set of options specific to that command.
Description: This function allows the user to create load curves.
Usage:
1. DSI displays the CURVE DEFINITION CARD, allowing the user to define the load curve.
> ENTER LOAD CURVE NUMBER (xxxx) OR -1 TO EXIT
> ENTER CURVE NAME (UP TO 8 CHARACTERS)
· DSI recommends using the extension .lcr for this command.
2. DSI prompts:
> ENTER DATA (TIME & VALUE) FOR POINT XXXX OR END
· Where XXXX is the point number and the input format is TIME, VALUE.
3. DSI displays the curve operations:
Figure 9.4.8.2 Curves Operations Menu
Description: This function allows the user to delete load curves.
Usage:
1. DSI displays the DEFINE CURVE CARD LIST and prompts:
> SELECT CARD TO DELETE
2. EXIT deletes the selected load curves from the database.
Description: This function will delete all functions that have not been used in model.
Description: This function lists the available load curves in the DEFINE CURVE CARD LIST.
Description: This function allows the user to quickly modify points on a defined curve.
Usage:
1. DSI lists the curves in the DEFINE CURVE CARD LIST, and prompts:
> SELECT CURVE FROM CURVE LIST
2. After selecting the curve, the CURVE DEFINITION CARD appears, allowing the user to edit the curve data.
Description: This function imports existing curve data into the DSI database.
Usage:
1. DSI displays the DSI FILE MENU, allowing the user to enter the curve (.cur) file.
2. Once the curve file is selected and the data is read in, DSI displays the DEFINE CURVE CARD LIST. The user has the choice of selecting the curves before they are plotted.
Note: The load curve database format is shown below. ALL text must be entered with CAPITAL letters.
line 1: $ DSI LOAD CURVE (Header line)
line 2: CURVE,CURVE ID,TYPE,CURVE TITLE(A5,I5,I5,1X,A8)
line 3: X1, Y1 (2F10.4)
line 4: X2, Y2 (2F10.4)
line 5: X3, Y3 (2F10.4)
etc.
line n: CURVE,CURVEID,TYPE,CURVETITLE(Repeat a new curve)
line n+1: X1, Y1 (2F10.4)
line n+2: X2, Y2 (2F10.4)
line n+3: X3, Y3 (2F10.4)
etc.
last line: END (A3) (Terminate Input)
Where:
CURVE: Header (Required).
CURVE ID: Load Curve Number
TYPE: Curve Type (0- Transient Analysis; 1- Stress Initialization)
CURVE TITLE: Curve's Title (User Defined)
X1, Y1: Curve Point 1
X2, Y2: Curve Point 2
END: Header (Required)
The following is an example of the LOAD CURVE file:
$DSI LOAD CURVE
CURVE 2 0 CURVE 2
0.0000 0.0000
1.0000 1.5000
2.0000 -0.0000
3.0000 0.5000
4.0000 -1.5000
CURVE 4 0 CURVE 4
0.0000 2.0000
6.0000 -3.5000
7.0000 1.5000
8.0000 2.0000
END
Description:This function allows user to renumber load curves.
Usage:
1.DSI prompts:
> SELECT OPTION
? AUTOMATIC ALL
ONE BY ONE
SELECT ONE
EXIT
Description: This function displays load curves.
Usage:
1. DSI displays the DEFINE CURVE CARD LIST.
2. After selecting a curve, DSI displays the following curve operations:
These options are explained in GRAPH
Description: This function checks curves used in suspension bushing.